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        <td class="header">&nbsp; Remove Antenna Pattern</td>
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<h3>Remove Antenna Pattern Operator</h3>
<br>

<p>This operator removes&nbsp;antenna pattern&nbsp;and&nbsp;range
    spreading loss corrections applied to the original ASAR and ERS
    products. For ERS product, it also&nbsp;removes replica pulse power
    correction and applies the analogue to digital converter (ADC) power
    less correction. This operator cannot be applied to multilooked product. Details of the functions of the operator
    are given
    below.</p><h4>ASAR Products</h4>

<p>
    For ground range detected products, the following corrections are removed:</p>
<ul>
    <li><p>antenna pattern gain</p></li>
    <li><p>range spreading loss</p></li>
</ul>
<p>
    For slant range complex products, such as ASAR IMS, APS products, no
    antenna pattern or&nbsp;range spreading correction has been applied,
    therefore the operater is not applicable to these products.</p>
<h4>ERS Products</h4>

<p>For&nbsp;ground range products, the following operations are performed:</p>

<ul>
    <li><p>remove antenna pattern gain</p></li>
    <li><p>remove range spreading loss</p></li>
    <li><p>remove replica pulse power (ERS-2 only)</p></li>
    <li><p>apply ADC correction</p></li>
</ul>
<p>For&nbsp;slant range products, the following operations are performed:</p>

<ul>
    <li><p>remove replica pulse power (ERS-2 only)</p></li>
    <li><p>apply ADC correction</p></li>
</ul>
<h4>Other Products</h4>

<p>For other products, such as ALOS PALSAR and RadarSAT-2 products, the&nbsp;operator is not applicable.</p>

<p></p>

<p>
    The parameter used by the operator is as follows:
</p>
<ol>
    <li>Source Band: All bands (amplitude or intensity) of the source product. User can
        select one or more bands. If no bands are selected, then by
        default, all bands are used for the operation. The operator is able to detect
        the right input band.
    </li>
</ol>
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<br>

<p><img style="width: 500px; height: 500px;" alt="" src="images/remove_antenna_pattern_dlg.jpg"></p>

<p></p>

<p>Reference:</p>

<p>[1] Rosich B., Meadows P., Absolute calibration of ASAR Level 1 products,
    ESA/ESRIN, ENVI-CLVL-EOPG-TN-03-0010, Issue 1, Rev. 5, October 2004</p>

<p> [2] Laur H., Bally P., Meadows P., S�nchez J., Sch�ttler B., Lopinto E.
    &amp; Esteban D., ERS SAR Calibration: Derivation of &#963;0 in ESA ERS SAR PRI
    Products, ESA/ESRIN, ES-TN-RS-PM-HL09, Issue 2, Rev. 5f, November 2004</p>

<p></p>
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